             :description "Write a function which drops every Nth item from a sequence."
             :tags ["easy" "seqs"]
             :tests ["(= (__ [1 2 3 4 5 6 7 8] 3) [1 2 4 5 7 8])"
-		    "(= (__ [:a :b :c :d :e :f] 2) [:a :c :e])"
+                    "(= (__ [:a :b :c :d :e :f] 2) [:a :c :e])"
                     "(= (__ [1 2 3 4 5 6] 4) [1 2 3 5 6])"]})
 
     (insert! :problems

            :description "The contains? function checks if a KEY is present in a given collection.  This often leads beginner clojurians to use it incorrectly with numerically indexed collections like vectors and lists."
            :tags ["easy"]
            :tests ["(contains? #{4 5 6} __)"
		    "(contains? [1 1 1 1 1] __)"
		    "(contains? {4 :a 2 :b} __)"
                    "(not (contains? '(1 2 4) __))"]})

       (insert! :problems

            :description "The some function takes a predicate function and a collection.  It returns the first logical true value of (predicate x) where x is an item in the collection."
            :tags ["easy"]
            :tests ["(= __ (some #{2 7 6} [5 6 7 8]))"
                    "(= __ (some #(when (even? %) %) [5 6 7 8]))"]})

       (insert! :problems
           {:_id 49
